Merge branch 'refactor/db-not-null-constraints-for-conversation_participations' into 'develop'

Add NOT NULL constraints for conversation_participations table

See merge request pleroma/pleroma!1894

priv/repo/migrations/20191026190759_set_not_null_for_conversation_participations.exs

@@ -0,0 +1,19 @@
+defmodule Pleroma.Repo.Migrations.SetNotNullForConversationParticipations do
+  use Ecto.Migration
+
+  # modify/3 function will require index recreation, so using execute/1 instead
+
+  def up do
+    execute("ALTER TABLE conversation_participations
+    ALTER COLUMN user_id SET NOT NULL,
+    ALTER COLUMN conversation_id SET NOT NULL,
+    ALTER COLUMN read SET NOT NULL")
+  end
+
+  def down do
+    execute("ALTER TABLE conversation_participations
+    ALTER COLUMN user_id DROP NOT NULL,
+    ALTER COLUMN conversation_id DROP NOT NULL,
+    ALTER COLUMN read DROP NOT NULL")
+  end
+end